🏷️ Basic Information

Make:

Citroën

Model:

GS / GSA

Year:

1973

Model Code Gs:

AC33

Model Code Gsa:

AC3E

👋 Introduction

Target Audience:

Professional mechanics and dedicated DIY enthusiasts seeking to maintain and repair Citroën GS/GSA vehicles.

Manual Value Proposition:

Provides factory-level technical data and repair procedures, often unavailable in generic repair guides, ensuring accurate and effective maintenance.

Manual Benefits:

Step-by-step instructions, critical specifications, illustrations, diagrams, and troubleshooting guides to empower owners and technicians.

Delivery Advantage:

Instant download provides immediate access to essential repair information, minimizing downtime.

📋 Manual Details

Vehicle Coverage:

Citroën GS and GSA models produced from 1970 onwards, with specific emphasis on the 1973 model year and its associated configurations.

Estimated Page Count:

400-600 (typical for comprehensive factory-style repair manuals of this era)

Manual Type:

Repair Service Manual / Workshop Manual

Language:

English

File Format:

PDF

Print Quality:

Full Printable

Viewing Features:

Zoom IN/OUT capability

Delivery Method:

Instant Download

Software Requirements:

Adobe PDF Reader & WinZip

Compatibility:

All Versions of Windows & Mac

📖 Manual Coverage

Powertrain:

Engine (1.0L, 1.3L), Transmission (Manual and Automatic variants), Clutch, Driveshafts, Differential.

Chassis:

Hydropneumatic Suspension System (front and rear), Steering System (including power steering options), Braking System (front discs, rear drums), Wheels and Tires.

Electrical:

Ignition System, Starting System, Charging System (alternator/dynamo), Lighting System (headlights, taillights, interior), Instrumentation, Wipers and Washers, Horn, Fuses and Relays, Wiring Diagrams.

Body And Interior:

Body Panels, Doors, Hood, Trunk, Interior Trim, Seats, HVAC (Heating, Ventilation, Air Conditioning - if applicable to the year/spec), Glass and Seals.

Maintenance:

Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Level Checks and Top-offs, Lubrication Points, Spark Plug Service, Tune-ups.

Repair And Overhaul:

Engine Disassembly and Reassembly, Transmission Overhaul, Suspension Component Replacement, Brake System Servicing, Electrical Component Diagnosis and Repair, Bodywork Repair Procedures.

Troubleshooting:

Diagnostic charts, common problem identification, root cause analysis for various systems.

Specifications And Data:

Torque values, clearances, fluid capacities, electrical specifications, engine timing settings, valve adjustments.

Depth Of Coverage:

Comprehensive, covering from basic maintenance to in-depth engine and component overhauls. Suitable for professional technicians and experienced DIY enthusiasts.

📊 Manual Specifications

File Format Details:

Portable Document Format (PDF), optimized for digital viewing and printing.

Printability:

Full printable pages, allowing users to print specific sections or the entire manual.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Searchability:

Likely text-searchable PDF, allowing users to quickly find specific keywords and topics.

⚙️ Engine Specifications

Engine Type 1973:

Flat-four (Horizontally opposed), Air-cooled OHV

Engine Displacement Gs:

1015 cc (1.0 Litre)

Engine Displacement Gsa:

1124 cc (1.1 Litre) and later 1299 cc (1.3 Litre)

Horsepower Gs 1015Cc:

Approx. 55-56 hp (DIN)

Horsepower Gsa 1124Cc:

Approx. 56-60 hp (DIN)

Torque Gs 1015Cc:

Approx. 74 Nm (55 lb-ft) at 3000 rpm

Fuel Delivery:

Single Barrel Carburetor (e.g., Solex C23 or similar) for standard models.

Ignition Type:

Distributor-based with points and condenser.

Cooling Method:

Air-cooled

🔧 Transmission

Gearbox Type:

4-speed Manual Transaxle

Automatic Transmission:

Optional 3-speed automatic (Citroën C-Matic) on some models.

Clutch Type:

Single dry plate, diaphragm spring

Transmission Fluid Type:

Hypoid Gear Oil API GL-4, SAE 90 (check manual for exact specification and capacity).

📐 Dimensions

Body Style:

5-door Hatchback

Wheelbase:

Approx. 2440 mm (96.1 inches)

Length:

Approx. 4050 mm (159.4 inches)

Width:

Approx. 1600 mm (63.0 inches)

Height:

Approx. 1380 mm (54.3 inches)

Curb Weight Approx:

900-1000 kg (1984-2205 lbs) depending on specification.

Gross Vehicle Weight Rating:

Refer to specific model plate and manual.

🛡️ Safety Features

Crash Test Ratings:

No standardized crash test ratings from modern agencies exist for vehicles of this era. However, the design prioritized occupant protection for its time.

Braking System:

Front disc brakes, Rear drum brakes. Some models featured Citroën's highly regarded self-adjusting brake system.

Suspension Stability:

The hydropneumatic suspension provided a stable and level ride, contributing to predictable handling.

Seatbelts:

Front seatbelts typically standard; rear seatbelts may have been optional or absent on very early models.

Body Structure:

Integrated body structure with safety crumple zones designed for the era.

💡 Technology Features

Radio System:

Optional AM/FM radio, often with a single speaker.

ABS:

Anti-lock Braking System (ABS) was not a standard feature on 1973 models.

Power Steering:

Power steering was an optional feature on some higher-trim GS models.

Connectivity Features:

No modern connectivity features such as Bluetooth or USB ports.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 km (3,000-4,500 miles) or 6 months, depending on usage and oil quality (refer to manual).

Air Filter Replacement:

Annually or as per mileage intervals (e.g., 15,000-20,000 km).

Spark Plug Replacement:

Typically at 20,000-30,000 km, with regular gap checks.

Engine Oil Type:

API SF/SG or equivalent, SAE 20W-50 or 10W-40 (check manual for precise viscosity and API rating).

Engine Oil Capacity:

Approx. 3.5 - 4.0 litres (check manual).

Coolant Type:

N/A (Air-cooled engine)

Brake Fluid Type:

DOT 3 or DOT 4 (check manual for specific type and interval for replacement).

Hydropneumatic Fluid Type:

LHM (Liquide Hydraulique Minéral) - Citroën's specific hydraulic fluid. Critical to use correct fluid for suspension.

Suspension Leaks:

Hydropneumatic system spheres, seals, and hoses can degrade over time, leading to leaks or loss of ride height. Requires specialized knowledge for repair.

Electrical Corrosion:

Older wiring harnesses and connections can be susceptible to corrosion and degradation, leading to intermittent electrical faults.

Carburetor Issues:

Carburetors may require periodic cleaning and adjustment due to age and fuel quality variations.

Rust Susceptibility:

Like many cars of this era, body panels and structural components can be prone to rust, especially in humid or coastal environments.

📚 Vehicle History

Citroen Philosophy:

Citroën has a long-standing reputation for innovation, advanced engineering, and distinctive design, particularly with its hydropneumatic suspension systems.

Gs Introduction:

The Citroën GS was introduced in 1970 as a mid-size family car, known for its aerodynamic styling and sophisticated suspension.

Gsa Development:

The GSA was an evolution of the GS, introduced in 1980, featuring styling updates (particularly the bumpers and front end) and interior refinements, but the core engineering remained similar to earlier models.

Production Period Gs:

1970-1986

Production Period Gsa:

1980-1986

Manufacturing Location:

Primarily France (Rennes-sur-Hyon).

🏆 Awards & Recognition

European Car Of The Year:

The Citroën GS was awarded the European Car of the Year in 1971.

Design Awards:

Praised for its aerodynamic design and innovative engineering for its time.